Washing apparatus for combustion chambers



H. T, wEls 1,849,737

WASHING APPARATUS FOR COMBUSTION CHAMBERS Marcfn l5, 1932.

Filed Sept. 9E 1929 Y gwoemtoi Jfe nr y T WS' Patented Mar. 15, 1932 UNITED STATES HENRY T. WEIS, F FAIBMONT, WEST VIRGINIA WASHING APPARATUS FOR COMBUSTION' CHAMBERS Application led September 9, 1929. Serial No. 391,223.

This invention relates to devices for washing the fire space of water tube boilers.

In use, water tube boilers become coated on the outside of the tubes with a hard scale and with dust. Various methods for cleaning this scale and dust have been provided, but due to the cylindrical shape of the tubes and their lproximity to each other, great dificulty has een experienced in getting a cleaning method which will permit of the cleaning of the whole surface of the tubes.

The primary object of this invention is the provision of a device for effectively cleaning the fire surfaces of boilers and particularly the outside of the water tubes of water tube boilers.

Other and further objects of the invention are to provide a cleaning device which will have (1) a delivery of water to the Surface of the metal to be cleaned, (2) a circulation of water about the water delivery to keep it from being burned, (3) a water conductor within the circulation Water, but separate therefrom, (4) a series of water protected openings for delivery of water or air and water to the surfaces to be cleaned and (5) means for moving the openings so as to cause them to direct the water to different parts of the surface to be cleaned.

Other and further objects of the invention will be apparent to those skilled in the art from a reading of the complete specification and claims.

Referring to the drawings wherein is illustrated a preferred embodiment of the invention,

Figure 1 is a fragmental view of a boiler to which my invention has been applied.

Figure 2 is an enlarged fragmental cross sectional View of the invention on the line 2 2 of Figure 1.

Figure 3 is an enlarged cross sectional view on the line 3-3 of Figure 1.

Figure 4 is a detail cross sectional view showing the connections at the left of Figure 1.

Fig. 5 is a cross-sectional view taken similar to Fig. 3 of a construction having a single row. Y

5 Throughout the figures, the same reference characters refer to the same or similar parts.

10 designates the Walls of a boiler, 11 the header at the end of the boiler in which the tubes 12 are secured.

In my preferred form, I have shown the cireulatlng Water container as constructed of a pipe and extending across the combustion chamber from side to side. The circulating water container is preferably mounted on bearings in the sides of the boiler furnace walls as at 14. These bearings 14 are sufficiently loose to permit the circulating Water container 13 to be freely turned as will be later described.

.At one end of the circulating water con- 05 talner 13 is a movable joint 15 which permits of the rotary movement of the container pipe 13 while the circulating Water flows from the valve 16 through the plpe 17 to the container 13 and out through the opposite end as will 70 be described.

Mounted on the container pipe 13 is a gear wheel 18 which is turned by a pinion 19 mounted on a suitable shaft 2O and turned by power from a suitable source, as the pulley wheel 21. The shaft 20 is supported by a bracket 22 in which it is journaled. The bracket 22 is secured to the wall of the boiler Wall as by bolts 23.

At the left end of the circulating water a0 container 13, as illustrated in Fi re 1, I have shown a T-connection 24 which has a stuing box 25 and a suitable packing to permit the turning of the circulating water container for a purpose to be described.

Within the circulating water container is a pipe 26 having a passage therein separate from the passage Within the circulating water container 13. Extending from the pas- ?Sage Within the pipe 26 are small pipes 27 90 extending through the Wall of the circulating water container 13. The connections of the small pipes 27 to the pipe 26 and the ipe 13, are made by any suitable method, as by electric welding. One end of the pipe 26 may be closed, as at the right end, as illustrated in Figure 4. The left end of the pipe 26, as illustrated in Figure 4, passes through a stufng box 28 on the end of the T-connection 24. lon

0 water in one or sic This stuffing box 28 forms a part of an elbow connection 29 which connects to the cleaning water supply which is received from a pipe 30 and is controlled by a valve 31.

If desired, air under pressure may be introduced at any suitable oint as from the pipe 32 under control of t e valve 33.

The ducts or pipes 27 may be arranged in one or more rows as shown so as to deliver more directions at the same time.

It is to be noted that in the operation of this invention, the circulating water has a dual function. During times when the cleaner is not in operation, the circulating water serves as a protector for the whole device, keeping the same suiiiciently cool to prevent injury by the heat of the ire chamber. But as important as this is its function during the cleaning operation. rlhe circulating water during operation has a tendency to protect the inner pipe from' the heat o the hre box and thereby keeps the water which is to be delivered to the tire chamber, in a cool state until it emerves from the opening ci the small pipes 2'?.

The eiiicient operation of this device depends to a great extent upon the delivery oi? cold water to the iire surfaces e the hoher.

- The circuiating water keeps the w .ter in the inner pipe at a cooler temperatu e, than would be possibie without the circulating ter. The operator is thus enabled dei cold water from the faces within the boiier.. t contacts the scaie, "le and ails te the w moved.

l will new describe the operation invention.

At all times during the operation er the boiler when a ire is kept in the combustion chamber, water is kept ilowing throu h the circulating watercontainer 13. The ow of this water is controlled by the operation of the valve 13. The water enters the pipe 17 and passes into the chamber of the pipe 13, out its opposite end and is discharged Jfrom the opening 24.

Normally, the valves 31 and 33 are kept closed. When however, it is desired to clean the interior of the combustion chamber, the valve 31 is opened, water passes through the elbow 29 and into the pipe 26 to the small pipes 27 and out through their outer openings into the combustion chamber and onto the outsides of the water tubes of the boiler. If air is desired with the water, the valve 33 is opened to admit air with the water.

ci my While the water or water and air mix-v 18. This rotary motion of the gear 18, turns the pipe 13. Due to the swivel joint 15 and the stuing boxes 25 and 28, the whole pipe 13 with the enclosed pipe 26 will turn. By this means, the openings of the pipes 27 may be turned in any one of many directions 'so as to reach all portions of the surface to be cleaned.

While I have shown and described in detail an embodiment of my invention, it is to be understood that I do not limit myself to the exact showing and that modifications and changes may be made without departing from the spirit of the invention and Within the scope of the appended claims.

Having described my invention what l 'claim and desire to secure by Letters Patent 1s:-

1. A cleaning device for the combustion chamber of a boiler comprising a water container extending close to parts of the boiler subject to the deposit of slag, means for supplying water to the container and a lead-ofi1 from the container, a passage through the water container and having an opening directed toward the said boiler parts, said opening being smaller than the passage, and a source of water under pressure, connected to the passage.

2. A. cleaning device for the combustion chamber of a boiler, comprising a water container extending across the space adjacent to parts of the boiler subject to the deposit of sieg, means Jfor supplying water to the container and a lead-ofi from the container, a

separate passage through a portion oi the Mater centainer and having an opening directed toward said boiler parts, connections for conducting a circulation of water through the 'water container and for delivering water to the passage, said opening being smaller than the passage and a source or" water under pressure connected to the passage.

3. A cleaning device for the combustion chamber of a boiler, comprising a water container extending across the space adjacent to parts of the boiler subject to the deposit of slag, means for supplying water to the con tainer and a lead-ofi from the container, a separate passage through substantially the length of the water container and having an opening directed toward the said boiler parts, said opening being smaller than the passage, connections at each end of the water container for conducting a circulation of water throughout substantially the length of the Water container, another connection for delivering water to the passage and a source of water under pressure for supplying water to the connection.

4. A cleaning device for the combustion chamber of a boiler comprising a water container extending close to parts of the boiler subject to the deposit of slag, means for supplying water to the container and a lead-0E from the container, a pipe through the water chamber, a series of ducts from the interior of the pipe to the outside of the container, said ducts being directed toward the said boiler parts and having a combined cross section smaller than that of the pipe, and a source of Water under pressure connected to the pipe.

5. A cleaning device for the combustion chamber of a boiler comprising a Water container extending across the space adjacent to parts of the boiler subject to the deposit of slag, means for supplying Water to the container and a lead-0H from the container, a pipe extending into the Water chamber and separate therefrom, a series of ducts from the interior of the pipe to the outside of the Wall of the container, said ducts being directed toward the said boiler parts and being of a size to have a combined cross section less than that of the pipe, connections for conducting a circulation of Water through the Water container, and a source of Water under pressure connected to the ipe. p 6. A cleaning device for the combustion chamber of a boiler comprising a Water container extending close to parts of the boiler subject to the deposit of slag, means for supplying Water to the container and a lead-off from the container, a separate Water passage extending into the Water container with an opening to the combustion chamber, said opening being smaller than the passage, means for pointing the opening in any one of several dierent directions to direct them toward the said boiler parts, a source of air under pressure and a source of water under pressure connected to the passage.

7. A cleaning device for the combustion chamber of a boiler comprising a Water container extending close to parts of the boiler subject to the deposit of slag, means for supplying Water to the container and a leadoiffrom the container, a separate Water passage extending into the Water container with a plurality of openings, said openings having a combined cross section less than the cross section of the passage, means for pointing the openings in any one of several diii'erent directions to direct them toward the said boiler parts, a source of air under pressure and a source of water under pressure connected to the separate Water passage.

8. A cleaning device for the combustion chamber of a boiler comprising a Water container extending across the space adjacent to parts of they boiler subject to the deposit .of slag, means for supplying Water to the container and a lead-off from the container, a separate Water passage extending into the water container and having a plurality of rows of openings, said openings having a combined cross section less than the cross section of the passage, means for pointing the openings in any one of several different directions, to direct them toward the said boiler parts, a source of air and a source of Water under pressure connected to the separate passage.

9. A cleaning device for the combustion chamber of a boiler comprising a pipe extending across the space adjacent to parts of the boiler subject to the deposit of slag, means for supplying Water to the pipe and a lead-off from the pipe, a separate pipe Within the lirst named pipe, small tubes extending from the inner pipe to and through the surface of the outer pipe and directed toward the said boiler parts, the combined area of the small tubes being less than that of the inner pipe and a source of Water under pressure connected to the inner pipe.

10. A cleaning device for the combustion chamber of a boiler comprising a Water pipe extending across the space adjacent to parts of the boiler subject to the deposit of slag, means for supplying water to the pipe and a lead-off from the pipe, a second pipe Within. the first named pipe and having its passage separate from the passage of the first pipe, a plurality of small tubes extending from the inner pipe to and through the surface of the outer pipe, the combined area of the small tubes being less than that of the inner pipe, means for pointing the openings in any onel of several different directions to direct them toward the said boiler parts and a source of air under pressure and a source of W'ater under pressure connected to the inner pipe.

11. That improvement in the method of removing slag or scale from the lire side of a boiler part by suddenly applying relatively cold Water to the slag While in a heated condition to crack the slag or scale from the boiler part which consists of circulating a cooling medium around the Water used for removal of the slag or scale.

12. The method of removing slag or scale from t-he lire side of a boiler part Which consists 'in passing cooling Water through a water carrier across the heating chamber and at intervals driving Water from apertures of a separate chamber Within the Water carrier against the slag While the latter is in heated condition to crack the slag or scale from the boiler part.

In testimony whereof, I hereunto aix my signature.

HENRY T. WEIS. 

